本溪市东风湖地热井施工和固井技术

Construction and Cementation Technologies for Dongfenghu Geothermal Well in Benxi City

摘要:

辽宁省本溪市东风湖地热井勘查施工项目，设计井深2000 m，要求终孔口径100 mm。钻井深度较深，终孔孔径较大；地层复杂，破碎、漏失严重，溶洞发育等，施工难度很大。着重介绍了该井施工工艺，主要包括异径钻头钻进、钻杆折断事故处理、前置钻头扩孔、固井工艺技术、扫塞通孔等，为类似工程提供借鉴。

Abstract:

The designed hole depth was 2000m for Dongfenghu geothermal well exploration construction project in Benxi of Liaoning Province, the well completion diameter was required to be 100mm. The construction was difficult because of the deep drilling and large completion diameter, complicated ground conditions with broken formation, leakage and caving development. This paper introduces the construction process, mainly including customized non-standard bit drilling, broken drill pipe treatment, hole reaming by pre-posed bit, cementing technology and drilling through cement plug, which can be reference for the similar projects.